Well-tubing dump.



J. C. KNOKE.

WELL TUBING DUMP.

APPLICATION FILED NOV-1. I915.

Patented Sept. 26, 1916.

v A a .4. o m 1pm 2 9 2km 4M k a ll .l H, W w I i N H w. j H 0 5 4% a 1a 6 /v/ Z/ JOHN'- C. KNOKE, MARICOPA, CALIFORNIA.

WELL-TUBING DUMP.

Application filed November 1, 1915. Serial No. 59,019.

I Maricopa, in the county of Kern and State ofcalifornia, have inventedcertain new and useful Improvements inWell-Tubing Dumps, of which thefollowing is a specification.

My invention relates to well pumping machinery, and more particularly toa device to be used in connection with deep well pumps, to facilitatethe removal thereof from the well under certain abnormal conditions ashereinafter described. The device is equally applicable in water or. oilwells, but since the conditions necessitating its use are more prevalentin oil wells, it will be described herein with particular reference tosuch wells. j

The usual type of deep well pump is so constructed that, under normalconditions, when it is desired, for any reason, to remove the tubing andthe working barrel connected thereto from the well, the valves andplunger may first be drawn out of the tubing by means of the string ofsucker rods. This allows the fluid in the tubing to drain back into thewell, whereupon said tubing may be more easily hauled up. In theoperation of oil wells, however, great quantities of sand are oftenproduced with the fluid and are very troublesome. One difficulty oftenexperienced is that caused by the sand filling and clogging the workingbarrel and lower end of the tubing, necessitating the removal of thetubing from the well in order to clear the working barrel and render itoperative. This is called sanding up and when a pumping well is in thiscondition it is not possible to pull up the standingvalvewith theplunger, by means of the sucker rods, in

the usual way and allow the fluid in the tub ing to flow back into thewell. The usual practice in the case of a well sanding up is to pull thestring of tubing out of the well, unscrewing sections of about feet longas the tubing is brought to the surface.

" As each section is unscrewed the fluid contained in the same flows outover the derrick floor and sprays the operators, causing much discomfitand wasting considerable valuable fluid. Moreover, a string of tubingfull of oil is very much heavier than it would otherwise be, thusrequiring additional power to hoist it out of the well.

The object of the present invention, therem v Specification of LettersPatent.

' tion 2 and normally allowed to seat itself by Patented Sept. as, rare.

fore, is to provide a means whereby the tub- 111g may be dralned of thefluid contained I therein, and the sucker rods removed, when the workingbarrel is rendered inoperative by being clogged with sand or otherwise,in order to facilitate the removal of said wolrlking barrel and saidtubing, from the we To this end by invention consists in the novelwell-tubing dump hereinafter described with reference to theaccompanying drawings, in which Figure 1 is a longitudinal sectionalView of the well-tubing dump in closed, or normal position. Fig. 2 is asimilar View to Fig. 1, except that the dump is shown in open positionand the sucker rods disjointed and ready for removal;

l and 2 represent two adjacent sections of well-tubing string. It is tobe understood that a pump of the usual deep-well type, not shown in thedrawings, is located at the lower end of the tube section 1. The twosections, 1 and 2 are united by a special form of coupling 3, having anlnterior tapered bore or seat 4, of slightly less diameter than" theinterior of the tubing 1 and 2, and provided with an opening 5 throughthe wall thereof. A substantially cylindrical sleeve or plunger-valve 6,having an exterior v tapered portion 7 adapted to seat within thecoupling 3, and to close the opening 5 when so seated, is placed withinthe tubing secgravity within said coupling 3, as shown in Fig.1. p

The sucker rod section 8, attached at its lower end to the pump plunger,not shown in the drawings, is joined to an adjacent section 9 at a pointslightly below the seatcoupling 3 in the tubing, by means of a specialcoupling consisting of two members 10 and 11, fastened respectively tothe sucker rod sections 8 and 9 by the usual 00 right-hand threadedjoints 12 and 13, but connected to each other by a. left-hand threadedjoint 14, said joint being the only one in the entire string of suckerrods pro vided with a left-hand thread. I The outside diameter of thecoupling member 11 is greater than. the inside diameter of the plungervalve 6. In the normal operation of the pump, said coupling 11 does notcome in contact with said plunger valve 6. But when the pump becomesclogged as by the sanding' up of the well, the coupling members 10 and11 may be separated by turning the entire string of sucker rods to theright, by means of the uppermost sectionl thereof. The string of suckerrods, thus freed from the stuck pump plunger, may then be drawn up outof the tubing. In so doing, the coupling member 11, engaging the plungervalve 6, lifts the sameoff its seat 4,as shown in Fig. 2, and carries itup through the tubing. This uncovers the opening 5 in the seatcoupling3, through which opening the fluid contained in the tubing drains backinto the well, and said tubing may be readily hauled up out of the well.I

I'have herein described my device in the form which is deemedpreferable. I am aware, however, that changes may be made withoutdeparting from the spirit of the-invention, and I therefore do not wishto be construed as limiting myself in this regard.

I' claim 1. A well-tubing dump for deep well pumps comprising a sectionlet into the tubing string above the Working barrel of the pump andprovided with an opening through its wall; a freely floating Valvemember seated in said section and normally covering said opening; andmeans carried by the sucker-rod string above the pump plunger forengaging said valve member to uncover said opening as said sucker-rodstring is withdrawn through the tubing string. r

2. A well-tubing dump comprising a section let into the tubing stringand provided with an opening through its wall; a valve member seated insaid section and normally covering said opening; means for disjointingthe sucker-rod string to enable it to be withdrawn through the tubingstring; and

means on said sucker-rod 7 string engaging said valve member to uncoversaid opening asthe disjointed sucker-rod string is withdrawn.

V 3. A well-tubing dump comprising a section let into the tubing stringand provided with an opening in its wall; a hollow plun- Y ger-valveadaptedto seat within said section to close said opening; and aseparable coupling member in the sucker-rod string adapted to engage thehollow plunger-valve and lift it to uncover the opening in the wall ofsaid tubing section.

' a. A well tubing dump comprising tubing having a seat formed in itsinterior and an opening through its wall in proximity to said seat; ahollow plunger-valve adapted to normally rest upon said'seat to closesaid opening; and a separable coupling member in the sucker-rod stringadapted to engage the hollow plunger-valve and lift it to uncover saidopening in the tubing wall.

5. A well tubing dump comprising tubing having a seat formed in itsinterior and an opening through its wall in proximity to said seat; ahollow plungervalve adapted to said sucker-rod string at a point belowsaid v plunger-valve engaging means. 6. A well tubing dump comprising asleeve section connectingthe ends of adjacent sections of thetubing-string and provided with an opening in the wall thereof; a hollowplunger-valve adapted to seat within said sleeve to close said opening;means carried by the sucker-rod string for engagingwith saidplunger-valve to raise the same to un cover said opening; and means fordisjoint ing said sucker-rod string at a point below said plunger-valveengaging means.

7. A well tubing dump comprising a sleeve section connecting the ends oftwo adj acent sections of the tubing-string, said sleeve section havingan interior annular tapering seat and an opening in its wall inproximity to said seat; a hollow plungervalve having a taper portionadapted to rest within said seat to, normally close said open centsections of the tubing-string, said sleeve 4 section having an interiorannular tapering seat and an opening inits wall in proximity to saidseat; a hollow plunger-"valve having a taper portion adapted to restwithin said seat to normally close said opening; a separable couplingmember for joining the ends of two adjacent sections of the sucker rodstring, said coupling member being adapted to engage said hollowplunger-valve to raise the same to uncover said opening.

9. A well tubing dump comprising a sleeve section connecting the ends oftwo adacent sections of the tubing-string, said sleeve section havinganinterior annular tapering seat and an opening in its wall in ing; and aseparable coupling for joining the ends of two adjacent sections of thesucker-rod string consisting of two members, each provided with aright-hand screwthread for attachment to one of said rod ends, andinter-engaging left-hand screwthreads for coupling said memberstogether, one of said members being of such diameter as to engage saidhollow plunger to lift the same to uncover said opening.

10. A well-tubing 'dump comprising a sleeve section let into the tubingstring and provided with an opening through its wall; a .plunger valveseated within said section and normally covering said opening; and aseparable coupling for joining the ends of two adjacent sections of thesucker-rod string consisting of two members, each provided with aright-hand screw-thread for attachment to one of said rod ends, andinter-engaging left-hand screw-threads for coupling said memberstogether, one of said members being of such diameter as to engage saidhollow plunger to lift the same to uncover said openin In testimonywhereof I have signed my name to this specification in the presence oftwo subscribing witnesses.

JOHN C. KNOKE.

Witnesses:

GUs NINKORICH, H. T. WEST.

